Why was the Shoemaker-Levy 9 impact on Jupiter so important to astronomers?
A) It dredged up material that allowed us to learn about Jupiter's interior.
B) It wiped out the dinosaurs.
C) It was the first clear evidence that impacts really occur.
D) It confirmed our theory of solar system formation.
E) It was the first event in modern history that was brighter than the full moon in the sky.
A) It dredged up material that allowed us to learn about Jupiter's interior.
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A slender uniform rod 100.00 cm long is used as a meter stick. Two parallel axes that are perpendicular to the rod are considered
The first axis passes through the 50-cm mark and the second axis passes through the 30-cm mark. What is the ratio of the moment of inertia through the second axis to the moment of inertia through the first axis? A) I2/I1 = 1.5 B) I2/I1 = 1.7 C) I2/I1 = 1.9 D) I2/I1 = 2.1 E) I2/I1 = 2.3
A soccer ball is released from rest at the top of a grassy incline. After 8.6 seconds, the ball travels 87 meters and 1.0 s after this, the ball reaches the bottom of the incline
(a) What was the magnitude of the ball's acceleration, assume it to be constant? (b) How long was the incline?
Neutral hydrogen can be detected because its electron occasionally ________ its spin and creates the 21-cm emission line for radio observers
Fill in the blank(s) with correct word
Suppose current is flowing in a wire from right to left. Which way do the electrons in the wire move?
a. right to left b. left to right c. in circles d. It is impossible to tell.